Geminids 2001
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Originally, the so-called 'preliminary reports' were meant as an immediate information about the observed activity level of major meteor showers based on a limited number of raw data sent to the IMO directly after the observations. This scheme worked well until the number of observers sending their (full) reports promptly increased so that we now reached a point where we receive an (almost) complete global data set within a few days after a major shower maximum. Of course, it is great to see that observers distribute their full data so quickly. This situation, however, implies that the people doing the input work for the IMO data bases will type the data only once. That is, we now have quite a large number of Geminid reports already in the VMDB (while still many Leonid and Geminid reports are coming in). As a further consequence, the present Geminid report is based on a large quantity of data obtained by 44 observers worldwide and it (almost) looks like a global analysis rather than a very preliminary report. This is also the reason for the delay...
Anyway, we very much appreciate the reports sent by the following 44 observers including 146.3h net observing time and a total of 5919 Geminids noted during the 2001 return of the shower:
Hershil Adesara (India) Koen Miskotte (Netherlands)
Rainer Arlt (Germany) Sirko Molau (Germany)
Felix Bettonvil (Netherlands) Sven Näther (Germany)
Sushrut Bhanushali (India) Francisco Ocana Gonzalez (Spain)
Lukas Bolz (Germany) Eran Ofek (Israel)
Biswajit Bose (India) Daniel Van Os (Netherlands)
Parag B. Deotare (India) Jacques Plee (France)
Frank Enzlein (Germany) Nilesh Puntambekar (India)
Christoph Gerber (Germany) Tushar Purohit (India)
George W. Gliba (USA) Jürgen Rendtel (Germany)
Shelagh Godwin (UK) Francisco Rodriguez Ramirez (Spain)
Madhura Gokhale (India) Keren Sharon (Israel)
Lew Gramer (USA) Brian Shulist (Canada)
Takema Hashimoto (Japan) George Spalding (UK)
Kamil Hornoch (Czech Republic) Ulrich Sperberg (Germany)
Tomislav Jurkic (Croatia) Enrico Stomeo (Italy)
Marco Langbroek (Netherlands) David Swann (USA)
Robert Lunsford (USA) Richard Taibi (USA)
Hartwig Luthen (Germany) Josep Trigo Rodriguez (Spain)
Qiang Ma (China) Michel Vandeputte (Belgium)
Pierre Martin (Canada) Heinrich Wiechell (Germany)
Alastair Mcbeath (UK) Nikolai Wünsche (Germany)
Of course, we will include all further data becoming available later in the global analysis of the Geminids 2001 and publish a respective paper in WGN. The 2001 return was well observed and the data is particularly useful because the night was free of disturbing moonlight. The Geminids showed a broad maximum with a plateau with ZHRs of the order of 120. The last column gives the time (UT) for a number of solar longitudes.
sol_long ZHR +- Time (UT)
260.311 28 1.5 0720 Dec 12
260.395 31 1.7
260.505 33 2.0 1200
260.743 47 2.9
260.889 56 3.5
261.050 64 4.3 0050 Dec 13
261.145 69 4.3
261.217 73 4.9
261.439 78 4.6 1000
261.688 89 4.8
261.877 107 4.5
261.921 111 3.7 2120
261.972 110 2.4
261.996 118 2.3 2310
262.014 120 2.1 2345
262.036 118 1.9 0005 Dec 14
262.052 117 1.9 0025
262.066 116 1.8 0045
262.076 116 1.7 0100
262.084 116 1.7 0110
262.096 116 1.7 0130
262.109 116 1.8 0150
262.126 117 1.9 0210
262.148 118 2.1 0245
262.170 120 2.3 0315
262.195 114 2.5 0350
262.219 108 2.8 0425
262.250 108 3.4 0505
262.295 112 4.0 0610
262.349 112 4.6 0725
262.361 113 4.8 0745
262.374 117 5.7 0805
262.436 96 6.4 0930
262.742 44 2.4 1645
sol_long Solar longitude (2000.0)
ZHR, +- Geminid ZHR and error; the r value was determined
from the magnitude data; zenith exponent gamma=1.0
Time (UT) time in 2001, rounded to the nearest 5 min time stamp
Information provided by Jürgen Rendtel, 2001 December 28Qiang Ma (China)[/SIZE] |
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